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今年1月美国的“HyFly”高超声速巡航导弹在冲刺马赫数6的飞行试验中因发动机故障而坠落于海中,但是美国国防部预研局(DARPA)和美国空军并没有减缓高超声速飞行器研制的步伐,并宣布将一直秘密进行的“猎鹰”高超声速飞机验证机计划提升为“黑雨燕”高超声速验证机计划,目标之一就是要研制一种飞行马赫数6以上的SR-71“黑鸟”间谍飞机的后继机 SR-72。
In January this year, the U.S. “HyFly” hypersonic cruise missiles crashed into the sea due to engine failure during the Sprint Mach 6 flight test. However, the Defense Advanced Research Institute (DARPA) and the U.S. Air Force did not slow down the hypersonic vehicle And announced that it will step up its secret “Falcon” hypersonic aircraft certification program to “Black Swift” hypersonic verification program, one of the goals is to develop a flight Mach number 6 or more SR-71 “Blackbird ” spy plane’s successor SR-72.